Sound streams were generated by randomly choosing the levels of tone pips from two different distributions, A and B. Of the 18 tone pips, the first nine were drawn from distribution A and the second nine from distribution B, or the opposite. The listeners' task was to indicate order, A-B or B-A. In two conditions the A and B distributions differed in mean (condition 1) or variance (condition 2). In contrast to an ideal observer, listeners' strategies were consistent across the two conditions. Analyses suggest that listeners relied primarily on the more intense tone pips in making their decisions.

译文

声音流是通过从两个不同的分布A和B中随机选择音调点的级别来生成的。在18个音调中,前9个来自分布A,后9个来自分布B,或相反。听众的任务是指示顺序,A-B或B-A。在两种情况下,A和B分布的均值 (条件1) 或方差 (条件2) 不同。与理想的观察者相比,听众的策略在两种情况下都是一致的。分析表明,听众在做出决定时主要依靠更强烈的音调。

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